I am a newbie to the forum and to M3s in general. I have narrowed my preferences to the 90 series, and would prefer either a convertible or a sedan, although I would consider a coupe. I understand that there is a fairly significant difference between the Nav system on the 2008 versus 2009+ models. Probably cannot afford a new M3 at this point. Budget is about $45K-$55K.
1. Are the 2008 cars with the early iDrive still worth considering?
2. Was the ECD (programmable damping system?)available in all models, even if as an upgrade?
3. What models or features should I avoid, and which ones are must haves?
4. Is CPO the only way to go, or would you consider the right car without the certification?
5. The performance package offered on the 2011: is it available on earlier models, and if so, what is the cost?

Thanks in advance for the responses. I will have to admit that I have come over to the M3 after strongly considering the Mustang Boss 302. Great motor, handles well. But, no Nav or satellite radio, no leather, no back seat in the Laguna Seca, poor back seat in the regular model. I have two boys, ages 4 and 6, who will ride in the car about 20% of the time, therefore my preference for either the sedan or the vert M3.

I have an '08 and I do like the new nav/idrive better. But, I doubt that is the reason you are buying the car and I would not make it an important issue. If the nav/idrive is that important, you might be looking at the wrong car.

I would look for something with low mileage and something that still has a warranty, or an aftermarket warranty available. It is simply insurance, these cars are incredible, but if the DCT breaks, I suspect it is $15-20K. I think the M3s are really tough, but I would avoid one with a lot of track time, etc. I do not think the occasional track day and autocrosses are any concern. I have seen instructors/students at the performance center just beat these things to death, and they just keep ticking. The instructors with 3riders doing launch after launch, smokin the tires/drifting through every corner and the cars just keep going (with frequent tire replacements).

I like mine with virtually all options, my only "regret" was the rear shade...., chincy. I don't think any options are "bad". I think the DCT is important to have. It is great to drive and the automatic function is nearly as good as a real automatic.

The performance package might be important to wannabe racers. The truth is that 99.99% of us will never fully utilize the capability of the car with or without the performance package. I would not turn one down, I think the wheels are nice and the minimal lowering probably looks good. I believe someone said Top Gear thought it was not as good as the regular ECD.

I am not sure about the ECD, so will leave it to others. I do think it adds a lot to the car and I would not want one without it.